Latitudinal range: 27.5° to 43.8°

Found in 4 samples

United States: North Fork of Owl Creek (UW V-79004) (Middle Eocene), Myton Pocket (BYU collection) (Middle Eocene), Myton Pocket (UFHNH collection) (Middle Eocene), Casa Blanca (Middle Eocene)

See also Protoreodon petersoni, Protoreodon pumilus